compiler/PPCTokenizingVisitor.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Sun, 10 May 2015 06:28:36 +0100
changeset 452 9f4558b3be66
child 454 a9cd5ea7cc36
child 459 4751c407bb40
permissions -rw-r--r--
Updated to PetitCompiler-JanKurs.111, PetitCompiler-Tests-JanKurs.51, PetitCompiler-Benchmarks-JanKurs.7, added PetitCompiler-Extras-Tests-JanKurs.4 Name: PetitCompiler-JanKurs.111 Author: JanKurs Time: 08-05-2015, 05:56:05.327 PM UUID: 8805e696-9933-49b8-a5c8-a963b931b996 Name: PetitCompiler-Tests-JanKurs.51 Author: JanKurs Time: 08-05-2015, 05:17:44.224 PM UUID: 21c24114-73be-4ba2-86cd-5a4402f778a0 Name: PetitCompiler-Benchmarks-JanKurs.7 Author: JanKurs Time: 07-05-2015, 06:06:12.918 PM UUID: 0e6e2c0a-90f6-4f46-9663-c66f636da602 Name: PetitCompiler-Extras-Tests-JanKurs.4 Author: JanKurs Time: 08-05-2015, 05:56:46.180 PM UUID: 4d4d4d23-c5bc-41ef-ad41-8a56528ddb42
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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"{ Package: 'stx:goodies/petitparser/compiler' }"
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"{ NameSpace: Smalltalk }"
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PPCRewritingVisitor subclass:#PPCTokenizingVisitor
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	instanceVariableNames:'tokens'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitCompiler-Visitors'
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!
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!PPCTokenizingVisitor methodsFor:'hooks'!
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afterAccept: node retval: retval
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    Halt if: [ node name = 'start' ].
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    self isRoot ifTrue: [ 
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        | tokenizerNode |
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        self change.
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        tokens addLast: self eofToken.
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        tokens do: [ :token | token unmarkForInline  ].
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        tokenizerNode := PPCTokenChoiceNode new
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            children: tokens asArray;
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            name: 'nextToken';
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            yourself.
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        ^ PPCTokenizingParserNode new
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            parser: retval;
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            tokenizer: tokenizerNode;
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            name: #'mainParser';
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            yourself
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    ].
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    ^ retval
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!
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eofToken
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    | ws  |
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    ws := PPCStarNode new
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        child: (PPCMessagePredicateNode new
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            message: #isSeparator;
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            yourself);
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        yourself.
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    ^ PPCTrimmingTokenNode new
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        child: PPCEndOfFileNode new;
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        whitespace: ws;
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        tokenClass: PPToken;
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        yourself.
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! !
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!PPCTokenizingVisitor methodsFor:'initialization'!
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initialize
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    super initialize.
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    tokens := OrderedCollection new.
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! !
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!PPCTokenizingVisitor methodsFor:'testing'!
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isRoot
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    ^ openSet size = 1
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! !
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!PPCTokenizingVisitor methodsFor:'tokens'!
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addToken: token
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    (tokens contains: [:e | e == token] ) ifFalse: [ 
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        tokens addLast: token
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    ]
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! !
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!PPCTokenizingVisitor methodsFor:'visiting'!
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visitActionNode: node
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    (node hasProperty: #trimmingToken) ifTrue: [ 
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        self change.
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        self addToken: node.
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        ^ PPCTokenConsumeNode new
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            child: node;
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            yourself	
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    ].
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    ^ super visitActionNode: node
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!
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visitTokenNode: node
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    self change.
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    self addToken: node.
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    ^ PPCTokenConsumeNode new
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        child: node;
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        yourself.
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!
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visitTrimmingTokenNode: node
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    self change.
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    self addToken: node.
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    ^ PPCTokenConsumeNode new
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        child: node;
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        yourself.
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! !
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   105